<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <link rel="stylesheet" href="https://cdn.bootcss.com/twitter-bootstrap/4.3.1/css/bootstrap.min.css">
    <link rel="stylesheet" href="css/style.css">
</head>
<body>
 <div class="container">
     <div class="row">
         <div class="col-md-4">
             <div class="list">内容</div>
         </div>
         <div class="col-md-4">
             <div class="row">
                 <div class="col-6">
                     <div class="list">内容</div>
                 </div>
                 <div class="col-6">
                     <div class="list">内容</div>
                 </div>
                 <div class="col-6">
                     <div class="list">内容</div>
                 </div>
                 <div class="col-6">
                     <div class="list">内容</div>
                 </div>
             </div>
         </div>
         <div class="col-md-4">
             <div class="list">内容</div>
         </div>
     </div>
 </div>
</body>
</html>